mathjs/examples/advanced/add_new_datatypes/index.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.

var math = require('../../../index');

// import the new type MyType and the function `add` in math.js
math.import(require('./MyType'));
math.import(require('./myAdd'));

// create a shortcut to the new type.
var MyType = math.type.MyType;

// use the new type
var ans1 = math.add(new MyType(2), new MyType(3));  // returns MyType(5)
console.log(ans1.toString());                       // outputs 'MyType:5'

// numbers will be converted to MyType
var ans2 = math.add(new MyType(4), 7);              // returns MyType(11)
console.log(ans2.toString());                       // outputs 'MyType:11'